Doughnut machine



April 21, 1942. I I s. A. GARDNER DOUGHNUT MACHINE Filed Aug. 28, 1940 4 Sheets-Sheet 1 m n e"! 186 5 Fig.1

' Stephen A. Gardner April 21, 1942. s. A. GARDNER DOUGHNUT MACHINE Filed Aug. 28, 1940 4 Sheets-Sheet 3 grwmbom Z m w WM/V G. MM e m RM m m m lm M x Q m Mn lgatented 1942 [UNITED STATE s PATENT OFFICE DOUGHNUT MAQHINE Stephen A. Gardner, Minneapolis, Minn., aslignor .-to Dough-King, Inc., Minneapolis, Minn., a corporation of Minnesota Application August 28, 1940, Serial No. 354,538

13 Claims;

viding a doughnut machine in which the capacity of the machine may be manually varied at will.

A still further-object of the invention resides in providing cams for operating the doughnut former and the control device of the doughnut machine and in providing a construction ior varying the capacity of the machine whereby a single-cam of fixed form can be used for each of said devices.

An object of the invention resides in providing each of the cams for operating the doughnut former and control device with a number of irregularities, each irregularity forming a doughnut and controlling the passage of a doughnut along the channel and inproviding means for preventing certalnof the irregularities from effecting the operation o'f the doughnut' former and control device. Another object of the invention resides in providing spring controlled means for urging the cam followers operating in conjunction with the said cams into engagement therewith and in providing means for periodically rendering said spring controlled means inoperable.

Another object of the invention resides in prov ding a shaft having engaging members thereon adapted to engage-parts movable with the cam followers for preventing movement of the followers toward the cam surfaces of the cams.

Another object of the invention resides in providing another cam adapted to be manually moved to engage or disengage a plurality of cam in providing a doughnut machine adapted to operate at three different capacities. A feature of the invention resides in employing two cam followers carried by the second shaft followers for controlling the capacity of the machine.

Other objects of the invention reside in the novel combination and arrangement ofparts and in the details of construction hereinafter illustrated and/or described.

In the drawings:

Fig. 1 isa plan view of a doughnut machine illu'strating an embodiment of my invention.

Fig. 2 is a longitudinal elevational sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a plan sectional view taken on line a 3-3 of Fig. 2.

and in moving said cam to engage one or both of Fig. 4 is a plan sectional view taken on line 4-4 of Fig. 2.

Fig. 5 is a view similar to Fig. 2 showing the parts in altered position.

r Fig. 6 is an elevational sectional view taken on line 66 of Fig. 3.

Fig, '7 is a detail sectional view taken 1-7-1 of Fig. 2.'

This invention is an improvement of my patent for Doughnut machine, No. 2,207,584, issued July 9, 1940, and the construction of parts not shown indetail in this-application may be had on line 'irom the said patent.

Inthe drawings I have shown a doughnut machine A which consists of a case l0 constructed with end walls I I and I2 and side walls l3 and H connected therewith; The case includes uprights 15 at the corners of the same which extend throughout the height of the case and to which the various walls are attached. The walls are preferably constructed of sheet metal and are directly secured to the uprights IS. The case l0 further includes upper and lower frames II which are channel-shaped in cross section and which extends throughout the major portion of the kettle and which provides a way along which the doughnuts may travel. The kettle it has one corner of the same removed, as designated at, leaving a main portion 250i the-width of the case llland of a length equal to about two-thirds of the length of the same. This construction provides an extension 25 to the kettle which extends up to the end wall I2. The case II is constructed with a ledge 21 extending about the margin of the same. A guard 29 on the case I8 issues upwardly from the walls thereof and overlies the edge of the ledge 21. The kettle I3 is supported on the frame I 1 in any suitable manner,

The channel 23 is arranged to provide a straight run 32 which starts in'closc proximity to wall I2 and follows along wall I3. Channel 23 at the end of run 32 makes a curve 33 which leads into another straight run 34 following along the wall II. At the end of this run the channel has another curve 35 which leads into still another straight run 38 which follows along the wall I4. At

nected to a straight run 43 parallel with the run 32 and disposed in close proximity thereto. The run 43 discharges into a reservoir 44 which is merely an enlargement of the said run. From this reservoir a short run 45 is provided which is connected by a curve 48 with the end of the run 32.

The major portion 25, of kettle l8,'is enclosed by means of a hood 41. This hood utilizes the uprights I5 at the end wall II and two other uprights 48 which are attached to the case ID at the locality of the end of the major portion of the kettle formed by the corner 24. Between the various uprights are provided glass panels 49 which are slidably supported in guides 5I whereby the said panels may be removed. The hood 41 includes a top by means of which the major portion 25 of kettle l8 is enclosed and which has not been shown in the drawings.

In the reservoir 44 is provided a vertical tubular duct 52 which communicates at its lower end with the bottom of the reservoir 44. In this duct is disposed a propeller or elevator 53 which is mounted on the armature shaft of a motor 54. The duct 52 communicates at its upper end with the run 45 of the channel 23, thus discharging the cooking liquid from the reservoir 44 and into the run 45 of the channel, from which it flows throughout the course of the channel and is returned into the reservoir.

Situated at the beginning of the run 32 of channel 23 is a doughnut former 55 which comprises a receptacle 58 for dough anda cutter 51 connected therewith. Such construction being well known in the art will not be described in detail in this application. The cutter 51 includes a flanged sleeve 58 which severs dough extrusions from the mass contained in the receptacle 58. This sleeve is reciprocated in a vertical direction by means of a forked arm 59 which is mounted on a rock shaft 8I. Rock shaft 8| is journaled at one end in a bearing 62 attached to frame I1, and at its other end in a manner to be presently more fully described. The forked arm 59 swings freely on the shaft 6| but may be locked in relation thereto by means of clutch 83.

Air pressure is provided in the upper portion of the receptacle 58 which forces the dough downwardly through the cutter and as the sleeve 58 is reciprocated, annular dough extrusions are deposited in the cooking liquid in the beginning of the run 32 of channel 23. i

In the run 38 of channel 23 is arranged a a,seo,14s

twisted tubular turner 85. This turner inverts the doughnuts after the same have beencooked a predetermined time so that the doughnuts may be cooked equally on both sides. Such construction being well known in the art will not be described in detail in this api 1lcation-.' It is to be noted, however. that the turner. inclines in the direction of flow oifthecookingliquid so that thebottoni I9 of the kettle I8 at' the run 4| is considerably lower than at the run 34.

In the run 43 of channel 23 is disposed an ejector 88 for removing the cookeddoughnuts from the cooking liquid. This ejector comprises a shaft fl which is constantly driven in a manner to be presently described in detail. This shaft has mounted on it. oppositely extending cranks 88 and 89. Sets of toothed blades 1i and 12 are mounted on the said cranksand are adapt ed to be alternately raised and lowered and also moved in a longitudinal direction as the shaft 81 rotates. The lower ends of these blades slide upon an inclined rest 13 which is mounted on the bottom l9 of kettle I8 in the portion of the run 43 leading from the curve 42. Itwill readily be comprehended that, as the doughnuts reach the said blades the doughnuts are elevated and progressed upwardly and'outwardly of the kettle l8. The ejector 86 is disposed within a trough 14 constructed with two side plates '15 and 18 and a bottom 11 connected therewith. The said trough extends outwardly beyond the wall I2 of the case I 0 and directs the doughnuts out of the machine.

For controlling the rate of travel of. the doughnuts along the channel 23, two control devices 18 and 19 are employed. These control devices operate to allow the doughnuts, one at a time, to enter the turner 85 and the. ejector 86, whereby the degree of cooking of the doughnuts on both sides may be controlled. The control device 18 is situated in the run 34 of channel 23, while the control device 19 is situated in the run 4| of channel 23. v

Inasmuch as the control devices 18 and 19 do not form any particular feature of the instant application for patent, the said devices have not been shown in detail in the. drawings and the same will not be described, reference being had to the Patent issued to Alexander S. T. .Lagaard for Doughnut machines, Number 2,207,546. It will be noted, however, that the control device 18 is operated by a shaft I I 2 and that the controldevice 19 is operated from the control device '18 through the sameshaft. It will be noted that each control devic rocks alternately in one direction and then in the other direction to allow the doughnuts, one at a time, to pass said device. This is accomplished by periodical oscillation of the shaft H2 which is procured in a manner'to be subsequently more fully described.

In order to procure sufficient cooking time for the doughnuts in advance of each control device,

when the machine is first started, it becomes necessary to prevent travel of the doughnuts until the desired number of doughnuts are in the machine. For this purpose the two control de- -vices 18 and 19 may be independently disconnected from or connected to the shaft H2 by clutch devices, not shown, which are operated by means of operating rods 29I and 292 which extend outwardly of the machine and have knobs 293 at their outer ends.

The cutter 55, the ejector 66, and the two control devices 18 and 19 are all operated by an operating mechanism I48 contained within a J chamber In formed within a case m, disposed .are covered at the top by a cover II which is secured to said walls by means of counter-sunk screws I52 threaded into bosses I53 formed on m. with another shaft m extending through thewall I48 of the case I44 and into the chamber 161. Withinthe chamber In of case I44 is formed an elongated boss 2I3 which is provided said walls. In a similar manner a closure I54 is provided for a lowermost portion of the case I44, which closure is attached to the wall structure I45 by means of screws I55 which are similarly threaded into bosses I58 formed on the wall structure I45. The case I44 is provided with pads I51 formed on the closure I54, which pads rest upon the upper frame I1 and are secured thereto by means of screws I58 which pass through the uppermost flanges of the frame members. of frame .I1 and are threaded into said pads.

The closure I54 of case I44 has attached to the underside thereof an electric motor I59 having a vertical shaft I8 I. Motor I59 is constructed with an end bell I82 provided with a flange I83 adapted to engage a ring I84 cast on the under surface of the closure I54. Screws I85 extending through the flange I83 are threaded into the ring I84 and hold the motor I59 attached to the closure I54. Motor I59 may be of any desirable construction and the details thereof have not been shown in the drawings. The'sh'aft I8I of motor I59 passes through a seal I88 and into the chamber I81 formed within the case I44.

Issuing from the wall I41 of case I44 are two bearing supports I88 and I89.' The hearing support I88 has attached to it a hearing "I for the lower end of a vertically extending shaft I12. This shaft is joumaled in its upper end in a ball bearing I13 which serves as an end thrust hearing for restraining longitudinal movement of the shaft I12. I Shaft I12 has secured to the lower end thereof a spur gear I14 which meshes with a pinion I15 fast on the shaft I8I of motor I59. Shaft I12 also has formed on it a worm I18 which meshes with a worm wheel I11 keyed to a horizontally extending shaft I18. Shaft I18 extends completely across the case and is journaled in bearings I8I and I82 carried by the end walls I48 and I49. V i

The ejector 88 is driven from the shaft I12 in the following manner: Shaft 81' of the said ejector extends through a tubular housing I83 provided with a flange I84 atone end. This flange is secured to the wall I49 of case I44 by means of screws I85. The housing I83 is provided at its outer end with a bearing I88 which journals one endof the shaft 81. The other end of this shaftextends into the chamber I81 of case I44 and is journaled in a bearing I81 issuing outwardly from the wall I41 of case I44. The shaft 81 has mounted on it a spiral gear I88 which meshes with another spiral gear I89 fast on the shaft I12. These gears are so proportioned that the shaft 81 travels at a suitable speed to alternately raise the toothed blades H and 12 and procure ejection of the doughnuts.

The mechanism for operating the control devices 18 and 19 will now be described in detail. Connected "to the shaft II2 by means of a universal joint H3 is a floating shaft II4. This shaft is connected by means of a universal joint with bearings 228 journaling the shaft I I8, This shaft has secured to the end of it a bevel gear 2I5 which meshes with another bevel gear 2I8 fast on a shaft 2" extending horizontally across the case I44. The latter shaft is journaled in bearings 2I8 carried by the side walls I48 an I48 of the case I44 and shown in-Fig. 4. I

Attached to the wall I48 of case I44, near the uppermost portion of the same, as best shown 1 228 which operates the control devices 18 and 19 has three depressions 21.2 in it, by means of which the control devices may be operated three times for each revolution of the shaft I18.

The lever 22I is urged to move in a counterclockwise direction, as viewed in Fig. 6, to cause the roller 228 to bear against the cam228 by means of the following. construction: Issuing inwardly from the wall I 41 of case I44 is a boss 23I which is bored at 232 to slidably receive a tubular spring housing 233. Tubular spring housing 233 has connected tothe end of it a socketed head 234 which has secured to it a forked arm 235. Arm 235 is pivoted by means of a pintle 238 to the arm 222 of lever 22I. Within the interior of the housing 233 is mounted a compression coil spring 231 which is seated at one end against'the head 234. A plug 245 is screwed into the boss 232 and engages the other end of the spring 231. It will be readily comprehended that the spring 231 urges the roller 228 to follow the surface 221 of cam 228. In the event thatthe spring 231 should break, plug 245 may be removed from the exterior of the device and the spring may be removed from the housing 233. A new spring may then be inserted and the plug 245screwed into the boss 23I.

For rocking the shaft 8| which operates the 1 cutter 55, the following construction is used:

Shaft 8I is connected by means of a coupling I9Iwith another shaft I92 extending across the -walls I48 and I49 of case I44. This latter shaft to engage the periphery I99 of a disc cam 2M. 8

Cam 29I is constructed with a hub 282, Fig. 4, which is keyed to the shaft I18. The surface I99 of cam 2M is formed with threeindentations 204 disposed 120 degrees apart which, when the roller I98 drops intothe same, permit the bell crank I95 to oscillate, whereby the cutter sleeve 58 is raised and lowered to procure the deposit.

of three dough formations into. the cooking Y liquid in the kettle I8 for each revolution of shaft 18. The roller I98 is urged into engage! ment with the surface I99 of cam 20I by means 1 of a spring similarto that described in connection with the mechanism for operating the con- The trol devices. This spring is contained'within a tubular housing 208 slidable in a boss 201 issuing from the wall I41 of case I44. The said spring acts against a head 208 which is pivoted to the end of the arm I98 of bell crank I 95'by means of a pin 2I0 and urges the same to cause a clockwise movement of shaft I92, as viewed in Fig. 5.

By means of the construction now to be described, and which constitutes the instant invention, operation of the cutter and control devices may be procured by means of two or three of the depressions of the cams referred to so that the machine may be operated at full capacity, two thirds capacity or'one third capacity. Extending across the walls I48 and I49 of the housing I44 is a shaft I90. This shaft is journaled in two bearings 92 carried by the walls I48 and I49 of the case I44. The shaft I90 has secured to it two arms 94 and 95, best shown in Figs. 4 and 6, which extend beneath the two spring housings 233 and 208. Each of'these spring housings has a ing 98 welded or brazed thereto which is constructed with a face 81 facing in the direction of the two cams 228 and 20I.

' surface of the plate 281.

The arms 94 and 95 are constructed with hooks 98 which, when the shaft is rocked, are adapted to engage the surfaces 91 of the lugs 98 and to restrain movement of the springs within the same. This holds the two cam followers 226 and I98 from engagement with the respective cams 228 and 20I and prevents the said cam followers from following the depressions in said cams while the spring housings are so engaged.

The shaft 9I is urged into the position shown in Fig. 6 by means of a spring 99, similar to the spring 231, which spring is contained in a spring housing IOI attached to the wall I41 of case I44, which is best shown in Fig. 2. This spring engages a plunger I02 slidable in the housing IOI and is pivoted to an arm I03 keyed on-shaft I90. Arm I08 has a stop I04 on the same which engages wall I41 and limits the movement of shaft I90 to its position in which the arms 94 and 95 are situated, as shown in Fig. 4.

The shaft I90 is rocked in its bearings in the following manner: Attached to the said shaft is an arm I05 which is provided with two cam followers in the form of rollers which are indicated at I 08a and I08b. These rollers are adapted to engage a cam I01 slidably mounted on the shaft I18. Cam I 01 is constructed with a single projecting portion I08 having an arcuate cam surface I09 of an extent approximately 120 degrees. The

rollers I08a and I08b are situated so that both rollers at one position will rest upon the projecting portion I08. Cam I01 has a pin 28I secured to it which passes through a hole 282 in the cam 20I (Fig. 4); By means of this construction, the cam I01 is keyed relative to the shaft I18 and may move axially with respect thereto. As will be noted in Fig. 3 the roller I080. is longer than the roller 'I08b so that either the roller I08a orboth the rollers may be made to engage the surface of the cam I01. The cam I01 is shifted longitudinally by means of the following construction: Extending downwardly from the cover I5I is'a boss 284 which is drilled to form a bearing for a shaft 285, best shown in Fig. 2. Shaft 285 extends outwardly beyond the cover and has secured to it a finger piece 288 by means of which the said shaft may be rotated. Shaft 285 also extends below the boss 284 and has secured to its lower end a plate 281. This plate has attached to it in off-set relation with respect to the shaft 285 a rod 289. Rod 289 has secured to the end of it an arm 2" which has attached to'it a pin 288. Bin 288 is adapted to engage within a groove 212 in a hub 215 formed on cam I 01. When the shaft 285 is rotated through engagement with finger piece 288, pin 212 shifts the hub 215 along the shaft,|18. At one extreme position of the cam both cam rollers I06a and I08b engage the cam surface of the cam. At the other extreme position of the cam neither of the cam rollers engage the cam. In an intermediate position of the cam only the roller I08a engages the cam. The hub 215 is held in adjusted position by means of a construction shown in detail in Fig. 7. Formed on the cover I5I is a boss 218 which is provided with a bore 211. In this bore is disposed a ball 218 which is adapted to engage any of a number of depressions 219 in the upper This ball is yieldlngly urged into engagement with the plate 281 by means of a compression coil spring 26I disposed in bore 211 which is seated at one end against the ball 218 and at its other end against a cap 282 secured to the cover I5I by means of screws 283.

The operation of my invention is as follows: When the machine is first to be used the motor I83 is energized which procures travel of the cook-.

ing liquid along the channel 23. Actuation of the motor I59 causes the shaft I18 to rotate and the ejector 88 is placed in operation. If the finger piece 288, which is attached to shaft 285, is rotated in one direction, cam I01 is moved out of engagement with either of the rollers I88a or I082). The two hooks 98 are then forced downwardly through the spring 98 and are free from the lugs 96. Both the cutter 55 and the control devices 18 and 19 are then operated each time the cam rollers 228 and I98 engage the cams 228 and 20I with which they cooperate. Thus three doughnuts are produced and the travel thereof along the machine controlled for eaeii operation of shaft I18. If the cam I01 is moved to an intermediate position, the same may be caused to engage only the roller 108a, and clearing the roller I08b. The roller I08a and the projecting portion I 08 of cam I01 are so situated that the arm I05 is raised when the cam rollers 228 and I98 are in position to engage one of the irregularities of the cams with-which they cooperate. Thus the hooks 98 are brought into engagement with the lugs 98 and the said cam followers prevented from functioning. As soon as the roller I08a passes the portion I08 of cam I01, the two cam followers 228 and I98 are free to engage the other two irregularities of the respective cams with which they cooperate. Thus two instead of three doughnuts are produced with each revolution of the shaft. When the cam I01 is shifted to its other extreme position, both rollers I08a and I08b are brought into the path of travel of the cam I01. The distance apart of the roller l08a and I08b circumferentialiy and the circumferential extent of the portion I08 of cam I01 is suflicient so that both cams may ride upon the surface I09 of said portion of the cam at the same time. It will thus be seen that the shifting the positionof the cam I01 to any of three positions.

The advantages of my inventionare manifest.

My improved doughnut machine is extremely positive in operation. The operating mechanism of my invention is simple and eliminates the need of variable forms of dams. the capacity of the machine may be easily and quickly varied. With my invention it is possible to procure one of three capacities.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. In a doughnut machine in which the doughnuts are progressed along a way, a doughnut 'former for depositing dough formations in the cooking liquid in the way, a drive shaft, a cam on the drive shaft, said cam having a plurality of irregularities thereon in excess of two, means controlled b said cam for operating said doughnut former and including a follower adapted to engage said cam, said follower causing an operation of the doughnut former when passing each irregularity, variable means for periodically engaging a part movable with said follower to restrain engagement of the follower with certain of said irregularities, a movable control member therefor adapted to occupy a number of positions corresponding to the number of irregularities of said cam and means operated-by said control member for operating said variable means to restrain engagement of said cam follower with a v certain number of said irregularities when the control member is in one position and with a different number of said irregularities when the control member is in another of its positions.

2. In a doughnutmachine in which the dough- With my invention second shaft, a second cam movable with said first'named cam, said second named followers being'adaptedto engage said second named cam,

means operable with said second named shaft for restraining engagement of said first named follower with said first named cam, and means for bringing one of said second named cam fo1-r lowers out of engagement with said second named cam.

4. In a doughnut machine in which the doughnuts are progressed along a way. a doughnut former for depositing dough formations in the cooking liquid in the way. a drive shaft, a cam on the drive shaft, laid cam having three irregularities thereon, means controlled by said cam for operating said doughnut former and including a follower adapted to engage said cam, said fol-- lower causing an operation of the doughnut former when passing each irregularity, a second shaft, an arm on said second shaft,'an engaging member on said arm adapted to engage a part movable with said follower to restrain engage-. ment of the follower with the surface of said cam,

' a second cam movable-with said first named cam,

said second named cam having a single irregularity thereon, two cam followers on said second named shaft having operating surfaces disposed in one or more different planes, and means for nuts are progressed alonga way, a doughnut thereof while the follower is in position'to engage certain of said irregularities, a movable control member therefor, adapted to occupy a number of positions corresponding to the number of irregularities of said cam and means operated by said control member for moving said latching means to engage the part movable with said cam follower to permit engagement of the cam follower with a certain number of said irregularities when the control member is in one position and with a different number of said irregularities when the control member is in another of its positions.

, 3. In a doughnutmachine in which the doughnuts are progressed along a way, a doughnut former for depositing dough formations in the cooking liquid in the way, a drive shaft, a cam on the drive shaft,-said cam having a plurality of irregularities'thereon in excess of two, means controlled by said cam for operating said doughnut former and including a follower adapted to engage said cam, said follower causing an operation of the doughnut former when passing each irregularity, a second shaft, an arm on said second shaft, a plurality of cam followers on said procuring relative axial movement between the second named followers and the second named cam for procuring operation of the followers with the'cam.at the various planes of engagement thereof.

5. In a doughnut machine in which the doughnuts are progressed along a way, a doughnut former for depositing dough formations in the cooking liquid in the way. a drive shaft, a cam on the drive shaft, said camhaving a plurality of irregularities thereon in excess of two. means controlled by said cam for operating said dough nut former and includinga follower adapted to engage said cam, said follower causing an operation of the doughnut former when passing each irregularity, a second cam movable with said first named cam, a second shaft, a plurality of cam followers on said second shaft arranged to engage said second named cam and disposed with their engaging surfaces at one or more different axial localities, means operable with said second named shaft for restraining engagement with first named follower with said first named cam, and means for procuring axial movement between said second named cam and cam followers for bringing any number of camfollowers into engagement with said second named cam.

6. In a doughnut machine in which the doughnuts are progressed along a way, a doughnut former for depositing dough formations in the cooking liquid in the way, a drive shaft, a cam on the drive shaft, said cam having three irregularities thereon, means controlled by said cam for operating said doughnut'former andincluding a follower adapted to engage said cam, said follower causing an operation of the doughnut former when passing each irregularity, a second cam movable with said first named cam, said second cam having a single irregularity thereon, a second shaft, an engaging member on said arm adapted to engage a part movable with said first named follower to restrain engagement of the first named follower with the surface of the first named cam, two cam followers on said second named shaft having operating surfaces of different axial extent andadapted to engage the second named cam, and means for procuring relative axial movement between the second named followers and the second named cam for procuring operation of one or both of said followers with the cam. A,

'7. In a doughnut machine in which the doughnuts are progressed along a way,;a doughnut former for depositing dough formations in the cooking liquid in the way, a drive shaft, a cam on the driveshaft, said cam having three irregularities thereon, means controlled by said cam foroperating said doughnut former and including a follower adapted to engage said cam, said follower causing an operation of the doughnut former when passing each irregularity, a second cam movable with said first named cam, said second cam having a single irregularity thereon, a second shaft, an engaging member on said second shaft adapted to engage a part movable with said first named follower to restrain engagement of the first named follower with the surface of the first named cam, two cam followers on said second named shaft having operating surfaces of different axial extent and-adapted to engage the second named cam, and means for procuring relative axial movement between the second named followers and the second named cam of an extent greater than the aggregate axial extent of the said followers for procuring operation of one or both of said followers with the cam or for moving both of the followers out of engagement with the cam.

8. In a. doughnut machine in which the doughnuts are progressed along a way, a doughnut former for depositing dough formations in the cooking liquid in the way, a drive shaft, a cam on the drive shaft, said cam having three irregularities thereon, means controlled by said cam for operating said doughnut former and includs ing a follower adapted to engage said cam, said follower causing an operation ofthe doughnut former when passing each irregularity, a second cam movable with said first named cam, said second cam having a single irregularity thereon, a second shaft, an engaging member on said second shaft adapted to engage a part movable with said first named follower to restrain engagement of the first named follower with the surface of the first named cam, two rollers on said second named shaft arranged in spaced relation circumferentially and adapted to engage said single irregularity on said second named cam, one of said-rollers being longer than the other, and means for procuring relative axial movement between the rollers and the second named cam for procuring operation of one or both of the rollers with the cam.

9. In a doughnut machine in which the doughnuts are progressed along a way, a doughnut former for depositing dough formations in the cooking liquid in the way, a drive shaft, a cam on the drive shaft, said cam having three irregularities thereon, means controlled by said cam for operating said doughnut former and including a follower adapted to engage said cam, said follower causing an operation of the doughnut former when passing each irregularity, a second cam movable with said first named cam, said second cam having a single projecting.portion thereon provided with an arcuate surface, a second shaft, an engaging member on said second named shaft adapted to engage a part movable with said first named follower to restrain engagement of said follower with the surface of said first named cam, two cam followers on said second named shaft having operating surfaces of different axial extent and adapted to engage the second named cam, said second named cam followers being spaced circumferentially a dis tance apart less than the circumferentialextent of said projecting portion of the second named cam, said cam followers when riding on said portion of the second named cam restraining engagement of the follower of the first named cam, and means for procuring relative axial move- ,ment' between the first named followers and second named cam for causing one or both of said followers to engage said second named cam or to become free therefrom whereby the first named follower is restrained from engaging the first named cam at one or two of said irergularities thereon or is free to engage in of the said irregularities.

10. In a doughnut machine in which the doughnuts are progressed along a way, movable control means for controlling the rate of travel of the doughnuts along the way, a drive shaft, a cam on said drive shaft, said cam having a plurality of irregularities thereon in excess of two, means controlled by said cam for controlling the operation of said control means and including a follower adapted to engage said cam, variable means for periodically engaging a part movable with said follower to restrain engagement of the follower with certain of said irregularities, a movable control member therefor adapted to occupy a number of positions corresponding to the number of irregularities of said cam and means operated by said control member for operating said variable means to restrain engagement of said cam follower with a certain number of said irregularities when the control member is in one position and with a different number of said irregularities when the control member is in another of its positions.

11. In a doughnut machine in which the doughnuts are progressed along 'a way, periodically operable control means for controlling the rate of travel of the doughnuts along the way, a drive shaft, a cam on said drive shaft, said cam having a plurality of irregularities thereon in excess of two, means controlled by said cam for operating said control means and including a follower adapted to engage said cam, said follower causing an operation of the control means when passing each irregularity, and latching means for engaging a part movable with said follower to prevent movement thereof while the follower is in position to engage certain of said irregularities.

12. In a doughnut machine in which the doughnuts are progressed along a way, periodically operable controlmeans for controlling the rate of travel of the doughnuts along the way, a drive shaft, a cam on said drive shaft, said cam having a plurality of irregularities thereon in excess of two, means controlled by said cam for operating said control means and including a follower adapted to engage said cam, said follower causing an operation'of the control means when passing each irregularity, a second cam movable with said first named cam, a second shaft, a plurality of cam followers on said second shaft adapted to engage said second named cam, means operable with said second named shaft for restraining engagement of said first named follower with said first named cam, and means for bringing one of said second named cam followers out of engagement with said second named cam.

13. In a doughnut machine in which the doughnuts are progressed along a way, periodically operable control means for controlling the rate of travel of the doughnutsalong the way, adrive shaft, a cam on said drive shaft, said cam having a plurality of irregularities thereon in excess of two, means controlled by said cam for operating said control means and including a follower adapted to engage said cam, said follower causing an operation of the control means when passing each irregularity a second cam movable with i said first named cam, a second shaft, a plurality of cam followers on said second shaft adapted to 10 engage said second named cam, means operable with said second named shaft for restraining movement of said first named follower with said first named cam, said second named followers having operating surfaces of different axialextent, and means for procuring relative axial movement between the second named followers and the second named cam for procuring operation of one or both of said followers with the cam.

STEPHEN A. GARDNER. 

